Gas-burner.



J. L. CRAWFORD.

, GAS BURNER.

APPLICATION FILED 313.21, 1911.

Eatented 0 I;31',1911.

INVENTOfi WITNESSES TE it; STA

omen.

JOHN L. CRAWFORD, OF MOUNT PLEASANT, PENNSYLVANIA.

GAS-BURNER.

Specification of Letters Patent.

Patent-ed Oct. 31, 1911.

Application filed February 21, 1911. Serial No. 610,021.

gasstoves and hot plates wherein artificial.

or natural gas is utilized as a fuel.

The object of .the invention is to provide a gas burner with positive and reliable means, in a manner as will be hereinafter set forth for agitating the gas and air admitted to the burner, toinsure. a thorough commingling and a proper combustion of the gas when ignited, thereby preventing escape of air'through the burner and the burning of raw gas.

I attain the above objects by a mechanical construction that will be hereinafter specifically described and then particularly claimed. V

Reference will now be had to the drawing.

Figure 1 is a perspective view of the burner in accordance with this invention. Fig. 2 is a longitudinal sectional view of the same, and Fig. 3 is a plan of a portion of the burner partly broken away and partly in section.

The reference numeral 1 denotes a pipe having one end thereof provided with a burner head 2 of the ordinary and well known type and the opposite end of the pipe is provided with angularly disposed arms 3 employed for connecting the burner to a suitable support. The end of the pipe 1 has the inner walls thereof screw threaded to receive the tapering end 1 of a mixer pipe 5. The mixer pipe has the opposite end thereof flared, as at 6 and protruding into the flared end of the pipe is a nozzle or nipple '7 of a valve S,carried by a gas supply pipe 9.

The upper portion of the mixer pipe 5 is cut-away in an arcuute-shaped manner and one side of the mixer pipe 5 is also cut-away. Formed inn-grail with the top of the mixer pipe 5 and surroumling'the arcuate-shaped cut-away portion is an offset 5 and formed integral with said oilsetand also with the side of the mixerpipe 5 is a hollow semicylindrical extension 10 provided with a bottom 10*. The extension 10 is open at its top and said extension 10 opens into the mixer pipe 5 and forms a compartment 11. The lower portion of the mixer pipe is flat and which forms a continuation of the'bottom 10 to the enlargement 10. The bottom 10 as well as the flattened portion of the mixer pipe 5 is provided with a transverselyextending groove 12 which terminates at one end in a vertically disposed groove 13 formed in the inner face of the wall of the mixer pipe 5. The groove 12 is positioned centrally with respect to the bottom 10 of the extension 10. Mounted in the grooves 12 and 13 is a C-shaped frame 14 and journaled centrally of the upper and lower arms 15 of said frame 14 is a vertically-disposed shaft 16 carrying a fan wheel '17. The upper arm 15 of the frame 14 is positioned below the top edge of the extension 10 andoifset 5. The inner face of the offset and inner face of the extension at the upper portion thereof are provided with threads as at 18 and engaging with the said threads 18 is the peripherally-threaded annular flange 19 which depends from a cap 20, t-he latter being adapted to seat upon the offset in the top edge of the extension 10 for closing the chamber 11. The upper face of the cap is provided with a transversely extending handle 21 to facilitate the mounting and removing of said cap when occasion so requires.

The pressure of gas entering the flared end 6 of the pipe 5 causes a suction of air in the flared end of said pipe and as the air and gas impinge the wheel 17 said wheel is caused to rapidly revolve and it is the rotation of this wheel that thoroughly commingles the air and gas before it passes into the burner head 2.

My invention resides solely in the mixer pipe 5 and' this pipe can be easily installed in connection with the type of burner shown or other types. Its simplicity of construction permits of its manufacture at a comparatively small cost and any suitable metal can be used. 1

\Vhat I claim is In combination, an air mixer pipe having its upper portion in one side cut-away intermediate its ends, an offset surrounding the cut-away portion at the top of said pipe, a semi-cylindricnl exteiision integral with said olfset and with the side of said pipe and opening into the pipe. said pipe'having its inner face and a portion of its bottom provided with a groove, said extension having the upper face of its bottom provided with u-owe in I with tha oifset and the :extension far closing m8 :'frame the pipe and the extension. 10 I in. said gmevas and extending In testimony whereof I affix my signature in the presene of two Witnesses.

with razspeciv to the pipe and JOHN L. CRAWFORD.

.mml m, am, shilfic journnim. cwwtmlly 0f 2.1% lmver arma of: saw). ame, a connected to said shaft and pro :1 5 25 14} pipe, and means wgaging Witnesses:

W. .P. HENDERSON, WM. J. CRAWFORD, J 1.". 

